How many diseases are caused by bacteria? Common cold, Pneumonia, Malaria,Dengue, Leshmaniasis, Typhoid, chikungunya, Tetanus

Options

A. (1) 4
B. (2) 3
C. (3) 6
D. (4) 2

Answer

To determine how many diseases from the given list are caused by bacteria, we will analyze each disease one by one.

### Step-by-Step Solution:

1. **Common Cold**:
- The common cold is caused by a virus (specifically, the influenza virus).
- **Conclusion**: Not caused by bacteria.

2. **Pneumonia**:
- Pneumonia can be caused by various pathogens, but one of the common bacterial causes is *Streptococcus pneumoniae*.
- **Conclusion**: Caused by bacteria.

3. **Malaria**:
- Malaria is caused by the *Plasmodium* species, which is a protozoan parasite, not a bacterium.
- **Conclusion**: Not caused by bacteria.

4. **Dengue**:
- Dengue fever is caused by the dengue virus.
- **Conclusion**: Not caused by bacteria.

5. **Leishmaniasis**:
- Leishmaniasis is caused by the *Leishmania* species, which is a protozoan parasite.
- **Conclusion**: Not caused by bacteria.

6. **Typhoid**:
- Typhoid fever is caused by *Salmonella typhi*, which is a bacterium.
- **Conclusion**: Caused by bacteria.

7. **Chikungunya**:
- Chikungunya is caused by the chikungunya virus.
- **Conclusion**: Not caused by bacteria.

8. **Tetanus**:
- Tetanus is caused by *Clostridium tetani*, which is a bacterium.
- **Conclusion**: Caused by bacteria.

### Summary of Findings:
- Diseases caused by bacteria:
- Pneumonia
- Typhoid
- Tetanus

- Total number of diseases caused by bacteria: **3**

### Final Answer:
**3 diseases are caused by bacteria.**

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